<nz-upload
[(nzFileList)]="fileList"
[nzBeforeUpload]="beforeUpload">
<button nz-button>
  <i class="anticon anticon-upload"></i><span>选择文件</span>
</button>
</nz-upload>
<div nz-row [nzType]="'flex'" [nzJustify]="'end'">
    <button nz-button [nzType]="'primary'" right [nzLoading]="uploading" (click)="handleUpload()" [disabled]="fileList.length == 0" style="margin-top: 16px">
        {{ uploading ? '上传中，请稍后' : '开始上传' }}
        </button>
</div>
